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Q: my 1994 sc 400 has a51,52 code which means bad knock sensors, i relaced them! on 1994 Lexus SC400

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
i replaced both knock sensors and that did nothing to help the problem,i lost $400.00,plus labor,i had the computer re done,for $300.00, that didn't help either'i had the wiring traced and tested,they were fine,car still reads code 51 and 52,bad knock sensors,no power, it ideals up and down, can some one tell me what the problem is?
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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It is not usually the sensors that fail but the electric harness that gets brittle with heat cycling or rodents eat the harness.
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